https://bugs.freedesktop.org/show_bug.cgi?id=93649
--- Comment #40 from AmarildoJr amarildosjr@riseup.net --- If disabling DPM fixed the issue, shouldn't developers study it's code a little bit? I'm 99.99% positive the issue is in there somewhere, even for AMDGPU (since RadeonSI and AMDGPU drivers share a lot of code).